function downLoad(evt) {

               disabledButton();

              MyPeriodicalExecuter(evt);

     }

      function disabledButton(){

             var inputs = document.getElementsByTagName_r("input");

           for(var i = 0;i

                   if(inputs[i].type.toLowerCase()=="button")

                             inputs[i].disabled=true;

               }

      }

      function MyPeriodicalExecuter(evt){

            succ.obj=evt;

          succ.loop=0;

           sh=setInterval(succ,1000);

     }

      function succ(){

               var str="禁止连续点击,"

              with(arguments.callee){

                        obj.value=str+"("+(loop++)+"/15)秒后再试";

                 if (loop > 15){

                                enabledButton();

                               obj.value=" 下载 ";

                              clearInterval(sh);

                             return;

                        }

               }

      }

      function enabledButton(){

              var inputs = document.getElementsByTagName_r("input");

           for(var i = 0;i

                   if(inputs[i].type.toLowerCase()=="button")

                             inputs[i].disabled=false;

              }

      }